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Silver metal drill bit 7/16 inch diameter 6 inches long

Drill America

Drill America 7/16in x 6in HSS Aircraft Extension Drill Bit pneumatic accessory

SKU CH-NKST-HHN4Y

7/16 inch HSS aircraft extension drill bit reaches deep holes with 6 inch overall length

  • Product typeDrill Accessories
  • 7/16 inch bore cuts clean holes in deep cavities
  • High-speed steel resists wear during extended drilling runs
  • 6 inch overall length reaches through thick workpieces
  • 4-1/16 inch flute clears chips efficiently from the cut

7/16in HSS Aircraft Extension Drill Bit

This new Drill America bit is a high-speed steel aircraft extension drill designed for deep-hole drilling in metal. It suits professional mechanics and fabricators who need extended reach in pneumatic or power drilling applications. The surface-treated finish helps resist wear during repetitive use.

6in overall length with 4-1/16in flute

The bit measures 6 inches overall with a flute length of 4-1/16 inches, which determines the maximum usable drilling depth. Buyers needing a shorter flute or a different diameter should select another size. The decimal equivalent is .4375 inches for precise tooling matching.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 80% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

How deep can the 7/16 inch bit actually drill in a single pass?

The flute length is 4-1/16 inches, so that is the maximum depth the bit can reach before chips must be cleared.

What shank size does the 6 inch aircraft extension bit use?

The shank matches the 7/16 inch drill diameter, so it fits any 1/2 inch or larger three-jaw chuck.

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